CN108771327A - A kind of education exhibition booth - Google Patents
A kind of education exhibition booth Download PDFInfo
- Publication number
- CN108771327A CN108771327A CN201810613709.7A CN201810613709A CN108771327A CN 108771327 A CN108771327 A CN 108771327A CN 201810613709 A CN201810613709 A CN 201810613709A CN 108771327 A CN108771327 A CN 108771327A
- Authority
- CN
- China
- Prior art keywords
- fixed
- display board
- bearing
- lead screw
- support plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B19/00—Reading-desks; Lecterns; Pulpits, i.e. free-standing
- A47B19/10—Reading-desks; Lecterns; Pulpits, i.e. free-standing characterised by association with auxiliary devices, e.g. paper clamps, line indicators
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B83/00—Combinations comprising two or more pieces of furniture of different kinds
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B97/00—Furniture or accessories for furniture, not provided for in other groups of this subclass
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F15/00—Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B2220/00—General furniture construction, e.g. fittings
- A47B2220/0075—Lighting
- A47B2220/0077—Lighting for furniture, e.g. cupboards and racks
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Displays For Variable Information Using Movable Means (AREA)
Abstract
本发明公开了一种教育用展台，包括两组支承座，每组支承座上固定倒“U”字形的立柱，立柱顶端设支承板，支承板和支承座之间设升降装置，升降装置上设带换面机构的第一展示板，支承板上表面的四个角上分别设柱体一，柱体一顶端设太阳能板；支承板中部设两个柱体，柱体顶端设安装板二，安装板二上设电机二，电机二的输出轴上固定套装线轱辘，线轱辘上的拉绳末端与第二展示板固定，第二展示板下端面与套筒固定，套筒套装在弯杆中部且与弯杆滑动连接，弯杆的两个自由端分别与两个立柱固定，两个立柱之间还设第三展示板，第三展示板的两侧面通过连杆与立柱固定。该发明承载的教育信息量大，宣传板面适应了使用的多种需求，功能多样。
The invention discloses an exhibition stand for education, which comprises two sets of supporting seats, each set of supporting seats is fixed with an inverted "U"-shaped column, the top of the column is provided with a supporting plate, and a lifting device is arranged between the supporting plate and the supporting seat. A first display board with a face changing mechanism is set, a column one is respectively arranged on the four corners of the upper surface of the support plate, and a solar panel is arranged at the top of the column one; , the motor 2 is set on the mounting plate 2, the output shaft of the motor 2 is fixed with a wire reel, the end of the drawstring on the wire reel is fixed with the second display board, the lower end of the second display board is fixed with the sleeve, and the sleeve is set in the curved The middle part of the rod is slidingly connected with the curved rod, and the two free ends of the curved rod are respectively fixed with two uprights, and a third display board is also arranged between the two uprights, and the two sides of the third display board are fixed with the uprights by connecting rods. The invention carries a large amount of educational information, and the publicity board adapts to various needs of use and has various functions.
Description
Technical field
The present invention relates to educational propaganda field, more particularly to a kind of education exhibition booth.
Background technology
Now, in terms of educational propaganda, school, which mostly uses, at present sets up the form of exhibition booth in campus and spreads education
And Knowledge Promotion, but common problem is：
First, propagandizing device is not humane, does not look after the height differences of viewer；
Second, function is relatively simple；
Third does not account for the environmental protection measure of green energy conservation.
The variation with environment of times is badly in need of in the development of educational practice, and the methods of innovative education publicity make education declare
It passes and is more grounded gas, better conforms to the epoch, is more effective.Therefore, a kind of education is come into being with exhibition booth.
Invention content
The object of the present invention is to provide a kind of education exhibition booths, to solve all problems mentioned above.
The technical scheme is that：
A kind of education exhibition booth, including four fulcrum bearings for being divided into two groups by front and back position, in every group of fulcrum bearing it is fixed fall
The top of the column of "U" shaped, two columns is provided with support plate, and front and back two groups are provided between the support plate and fulcrum bearing
Lifting gear is provided with the first display board on the lifting gear, and achievable 180 ° of overturnings are provided on first display board
Change the Huan Mian mechanisms in face；It is respectively arranged with cylinder one on four angles of the support plate upper surface, the top of the cylinder one is set
It is equipped with solar panels；There are two cylinders for the middle part setting of the support plate, and the top of the cylinder is provided with mounting plate two, described
The top of mounting plate two is provided with motor two, and fixing sleeve is rolled equipped with line on the output shaft of the motor two, on the line wheel
It is wrapped drawstring, the end of the drawstring is fixed with the second display board upper surface, the lower face of second display board and sleeve
Fixed, the sleeve is sleeved in the middle part of curved bar and is slidably connected with curved bar, and the curved bar is U-shaped, and two free end is distinguished
It is fixed with two the upper end of the column, is additionally provided between two columns and controls two third display boards, the two of the third display board
Side is respectively arranged with connecting rod, and the one end of the connecting rod far from third display board is fixed in the middle part of column；The support plate upper table
Face is provided with accumulator, and institute's accumulator is electrically connected with solar panels, and controller is provided on the column, and the controller passes through
Control switch is electrically connected with accumulator, and the motor two is electrically connected with the controller.
Further, the lifting gear includes motor one, and the output shaft of the motor one passes through shaft coupling and lead screw one
The upper end of connection, the lead screw one is set with fixed pulley one, and the lower section of the belt wheel one is provided with bearing two, and the bearing two is solid
It is scheduled in the mounting hole one on support plate, is set with lead screw one in the bearing two, the middle part of the lead screw one is slidably connected nut
Seat one, the lower end of the lead screw one and the bearing one being arranged in fulcrum bearing upper surface groove one are fixed and are set with, the belt wheel one
It is sequentially connected by synchrome conveying belt and belt wheel two, the belt wheel two is set with the top for being fixed on lead screw two, the belt wheel two
Lower section is provided with bearing three, and the bearing three is fixed in the mounting hole two on support plate, and lead screw two is set in the bearing three,
The middle part of the lead screw two is slidably connected nut seat two, the lower end of the lead screw two be arranged in fulcrum bearing upper surface groove two
Bearing four fix suit, the first display board is connected between the nut seat two and nut seat one.
Further, the Huan Mian mechanisms include the mounting hole three being respectively set at left and right sides of the first display board, described
It is provided with bearing five in mounting hole three, package packing rotating shaft in the bearing five, one end difference of the shaft far from the first display board
It is fixed with nut seat two and nut seat one；The lower surface of the nut seat one is provided with fixed plate, is offered in the fixed plate
Mounting hole four is provided with shop bolt, the shop bolt and the limit for being opened in the first display board side in the mounting hole four
The matching of position hole clamps.
Further, it is provided with lighting device below the support plate, photosensitive switch is provided on the lighting device,
Lighting device is electrically connected by photosensitive switch and accumulator.
Further, the column is equipped with USB jack and charging socket, the accumulator respectively with USB sockets and fill
Electrical socket is electrically connected.
Further, the upper end of the third display board is equipped with the LED scrolling display plates being electrically connected with the controller, and described the
The lower end of three display boards is equipped with convenience-for-people tool box, convenience-for-people medical box and complains suggestion box successively.
Further, it is additionally provided with the seat that a circle facilitates rest around two columns.
Compared with prior art, beneficial effects of the present invention：
1, a kind of education exhibition booth provided by the invention, is provided with two groups of lifting gears, is used for controlling two first respectively
The height of display board, in order to adjust the optimal read height of reader, be unlikely to because for a long time face upward head or watch on all fours and
Influence health.
2, solar panels of the invention collect the luminous energy of the sun and are converted into power storage in accumulator, are energy conservation and environmental protections
Green energy resource, can be used for electrical appliances such as charging, driving motor, illuminations；The photosensitive switch being arranged on lighting device is used
To acquire the brightness data of light, when brightness brightness lower threshold value preset less than controller, controller sends out instruction control and shines
Bright device is bright, and when brightness brightness upper threshold value preset equal to controller, controller sends out instruction control lighting device and goes out, in this way
As much as possible sunlight can be utilized, avoid waste electric energy.
3, the present invention utilizes the column of two inverted U-shaped structures, forms quadrangular frame, and set between two columns respectively
Multiple display boards are equipped with, to increase the information content of education to greatest extent, convenient for publicity and the propagation of current events main points, multiple displayings
Form accommodation space between plate and support plate, people can by adjusting entering accommodation space after the angle and height of display board, with
The content of the convenient publicity back of viewing inside, moreover it is possible to sun-rain-shading.
The power source of the invention is the solar energy of green energy conservation, and publicity board number is more, big for the plate face area of displaying, exhibition
Show plate height and adjustable angle, it is vdiverse in function, it is easy to use, convenient for promoting.
Description of the drawings
Fig. 1 is the front view of the present invention；
Fig. 2 is the left view of the present invention.
Specific implementation mode
1 and Fig. 2 below in conjunction with the accompanying drawings, is described in detail the specific embodiment of the present invention, it is to be understood that
Protection scope of the present invention is not restricted by specific implementation.
Referring to Fig. 1 and Fig. 2, an embodiment of the present invention provides a kind of education exhibition booth, including four are divided by front and back position
Two groups of fulcrum bearing 1 fixes the column 2 of inverted " u " font in every group of fulcrum bearing 1, and the top of two columns 2 is provided with support plate
10, it is provided with front and back two groups of lifting gears between the support plate 10 and fulcrum bearing 1, the first exhibition is provided on the lifting gear
Show plate 5, the achievable 180 ° Huan Mian mechanisms for turning over conversion surface are provided on first display board 5；10 upper surface of the support plate
Four angles on be respectively arranged with cylinder 1, the top of the cylinder 1 is provided with solar panels 20；The support plate 10
Middle part setting there are two cylinder 16, the top of the cylinder 16 is provided with mounting plate 2 26, the top of the mounting plate 2 26
It is provided with motor 2 15, fixing sleeve is equipped with line wheel 14 on the output shaft of the motor 2 15, is wrapped on the line wheel 14
Drawstring 13, the end of the drawstring 13 are fixed with 9 upper surface of the second display board, lower face and the sleeve 8 of second display board 9
Fixed, the sleeve 8 is sleeved on 7 middle part of curved bar and is slidably connected with curved bar 7, and the curved bar 7 is U-shaped, and two free end
It is fixed respectively with two 2 upper ends of column, the two third display boards 19 in left and right, the third exhibition is additionally provided between two columns 2
Show that the two sides of plate 19 are respectively arranged with connecting rod, the one end of the connecting rod far from third display board 19 and 2 middle part of column are fixed；
10 upper surface of the support plate is provided with accumulator, and institute's accumulator is electrically connected with solar panels 20, and control is provided on the column 2
Device processed, the controller are electrically connected by controlling switch with accumulator, and the motor 2 15 is electrically connected with the controller.
Wherein, 14 rotation of the band moving-wire that can be synchronized wheel is rotated by control motor 2 15, line wheel 14 rotates same
When, you can the line length for changing drawstring 13, to the variation at the inclination angle of the second display board 9 of realization.
Wherein, two motors 2 15 can be designed as synchronization, realize that the synchronous of the inclination angle of two the second display boards 9 becomes
Change, or two motors 2 15 are designed as asynchronous, realizes individually adjusting for the inclination angle of two the second display boards 9.
Further, the lifting gear includes motor 1, and the output shaft of the motor 1 passes through shaft coupling and silk
Bar 1 connects, and the upper end of the lead screw 1 is set with fixed pulley 1, and the lower section of the belt wheel 1 is provided with bearing
Two, the bearing two is fixed in the mounting hole one on support plate 10, and lead screw 1, the lead screw one are set in the bearing two
22 middle part is slidably connected nut seat 1, the lower end of the lead screw 1 and is arranged in 1 upper surface groove one of fulcrum bearing
Bearing one fixes suit, and the belt wheel 1 is sequentially connected by synchrome conveying belt 12 and belt wheel 2 11,2 11 sets of the belt wheel
Dress is fixed on the top of lead screw 24, and the lower section of the belt wheel 2 11 is provided with bearing three, and the bearing three is fixed on support plate 10
On mounting hole two in, be set with lead screw 24 in the bearing three, the middle part of the lead screw 24 is slidably connected nut seat 26, institute
Suit, 26 He of the nut seat are fixed in the lower end and the bearing four being arranged in 1 upper surface groove two of fulcrum bearing for stating lead screw 24
The first display board 5 is connected between nut seat 1.
Further, the Huan Mian mechanisms include the mounting hole three that is respectively set of the left and right sides of the first display board 5, described
It is provided with bearing five in mounting hole three, package packing rotating shaft in the bearing five, one end difference of the shaft far from the first display board 5
It is fixed with nut seat 26 and nut seat 1；The lower surface of the nut seat 1 is provided with fixed plate 24, the fixed plate 24
On offer mounting hole four, be provided with shop bolt 25 in the mounting hole four, the shop bolt 25 and be opened in the first exhibition
Show that the limit hole matching of 5 side of plate clamps.
Wherein, when shop bolt 25 being extracted from limit hole, the first display board 5 can be pushed to be rotated around shaft manually
180 °, face is changed in realization, after changing face, shop bolt 25 is inserted into limit hole, you can realize the limit of the first display board 5.
Further, the lower section of the support plate 10 is provided with lighting device, and photosensitive open is provided on the lighting device
It closes, lighting device is electrically connected by photosensitive switch and accumulator.
Further, the column 2 be equipped with USB jack and charging socket, the accumulator respectively with USB jack and
Charging socket is electrically connected.
Further, the upper end of the third display board 19 is equipped with the LED scrolling display plates being electrically connected with the controller, described
The lower end of third display board 19 is equipped with convenience-for-people tool box, convenience-for-people medical box and complains suggestion box successively.
Further, it is additionally provided with the seat 3 that a circle facilitates rest around two columns 2.
Wherein, controller is microcontroller, model STM8S103F3.
In conclusion a kind of education exhibition booth provided in an embodiment of the present invention, apparatus for controlling of lifting is used for controlling the first exhibition
Show that the height of plate, the first display board Shang Shehuanmian mechanisms, two faces may be by, plate face utilization rate is high, it may be convenient to adjust
Its whole height, in order to adjust the first display board to help reader read optimum height, be unlikely to because for a long time face upward head or
Person watches and influences health on all fours.
The photosensitive switch being arranged on lighting device, to acquire the brightness data of light, when brightness is default less than controller
Brightness lower threshold value when, controller send out instruction control lighting device it is bright, when brightness be equal to the preset brightness upper threshold value of controller
When, controller sends out instruction control lighting device and goes out, and as much as possible can utilize sunlight in this way, avoid waste electric energy.
It is dynamic can to provide continuation of the journey for the mobile phone and electric appliance of various different models for the USB jack and charging socket that column is equipped with
Power.
Solar panels collect the luminous energy of the sun and are converted into power storage in accumulator, are energy-saving and environment-friendly green energy
Source can be used for electrical appliances such as charging, driving motor, illuminations.
The power source of the invention is the solar energy of green energy conservation, and publicity board number is more, big for the plate face area of displaying, a surname
The displaying height for passing plate is individually adjustable, vdiverse in function, easy to use, convenient for promoting.
Disclosed above is only several specific embodiments of the present invention, and still, the embodiment of the present invention is not limited to this, is appointed
What what those skilled in the art can think variation should all fall into protection scope of the present invention.
Claims (7)
1. a kind of education exhibition booth, which is characterized in that be divided by front and back position two groups of fulcrum bearing (1), every group of branch including four
The column (2) of inverted " u " font is fixed in bearing (1), the top of two columns (2) is provided with support plate (10), the support plate
(10) it is provided with front and back two groups of lifting gears between fulcrum bearing (1), the first display board (5) is provided on the lifting gear,
The achievable 180 ° Huan Mian mechanisms for turning over conversion surface are provided on first display board (5)；Support plate (10) upper surface
Cylinder one (18) is respectively arranged on four angles, the top of the cylinder one (18) is provided with solar panels (20)；The bearing
There are two cylinders (16) for the middle part setting of plate (10), and the top of the cylinder (16) is provided with mounting plate two (26), the installation
Motor two (15) is provided with above plate two (26), fixing sleeve rolls (14) equipped with line on the output shaft of the motor two (15),
It is wrapped drawstring (13) on the line wheel (14), end and the second display board (9) upper surface of the drawstring (13) are fixed, institute
It is fixed with sleeve (8) to state the lower face of the second display board (9), the sleeve (8) be sleeved in the middle part of curved bar (7) and with curved bar (7)
It is slidably connected, the curved bar (7) is U-shaped, and two free end is fixed with two column (2) upper ends respectively, two columns (2)
Between be additionally provided with the two third display boards (19) in left and right, the two sides of the third display board (19) are respectively arranged with connecting rod,
The one end of the connecting rod far from third display board (19) is fixed in the middle part of column (2)；Support plate (10) upper surface is provided with
Accumulator, institute's accumulator are electrically connected with solar panels (20), are provided with controller on the column (2), the controller passes through
Control switch is electrically connected with accumulator, and the motor two (15) is electrically connected with the controller.
2. a kind of education exhibition booth as described in claim 1, which is characterized in that the lifting gear includes motor one (17),
The output shaft of the motor one (17) is connect by shaft coupling with lead screw one (22), and the upper end suit of the lead screw one (22) is fixed
Belt wheel one (21) is provided with bearing two below the belt wheel one (21), and the bearing two is fixed on the peace on support plate (10)
It filling in hole one, suit lead screw one (22) in the bearing two, be slidably connected nut seat one (23) in the middle part of the lead screw one (22),
The lower end of the lead screw one (22) is fixed with the bearing one being arranged in fulcrum bearing (1) upper surface groove one and is set with, the belt wheel
One (21) are sequentially connected by synchrome conveying belt (12) and belt wheel two (11), and the belt wheel two (11) suit is fixed on lead screw two
(4) top is provided with bearing three below the belt wheel two (11), and the bearing three is fixed on the installation on support plate (10)
In hole two, lead screw two (4) is set in the bearing three, be slidably connected nut seat two (6) in the middle part of the lead screw two (4), described
The lower end of lead screw two (4) is fixed with the bearing four being arranged in fulcrum bearing (1) upper surface groove two and is set with, the nut seat two
(6) the first display board (5) is connected between nut seat one (23).
3. a kind of education exhibition booth as claimed in claim 2, which is characterized in that the Huan Mian mechanisms include the first display board
(5) mounting hole three being respectively set at left and right sides of is provided with bearing five in the mounting hole three, and suit turns in the bearing five
Axis, the one end of the shaft far from the first display board (5) are fixed with nut seat two (6) and nut seat one (23) respectively；The spiral shell
The lower surface of female seat one (23) is provided with fixed plate (24), and mounting hole four, the mounting hole are offered on the fixed plate (24)
Shop bolt (25) is provided in four, the shop bolt (25) matches with the limit hole for being opened in the first display board (5) side
It clamps.
4. a kind of education exhibition booth as described in claim 1, which is characterized in that be provided with photograph below the support plate (10)
Bright device, photosensitive switch is provided on the lighting device, and lighting device passes through photosensitive switch and accumulator electrical connection.
5. a kind of education exhibition booth as described in claim 1, which is characterized in that the column (2) is equipped with USB jack and fills
Electrical socket, the accumulator are electrically connected with USB jack and charging socket respectively.
6. a kind of education exhibition booth as described in claim 1, which is characterized in that the upper end of the third display board (19) is equipped with
The LED scrolling display plates being electrically connected with the controller, the lower end of the third display board (19) are equipped with convenience-for-people tool box, convenience-for-people successively
Medical box and complaint suggestion box.
7. a kind of education exhibition booth as described in claim 1, which is characterized in that be additionally provided with a circle around two columns (2)
Facilitate the seat (3) of rest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810613709.7A CN108771327A (en) | 2018-06-14 | 2018-06-14 | A kind of education exhibition booth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810613709.7A CN108771327A (en) | 2018-06-14 | 2018-06-14 | A kind of education exhibition booth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108771327A true CN108771327A (en) | 2018-11-09 |
Family
ID=64025093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810613709.7A Pending CN108771327A (en) | 2018-06-14 | 2018-06-14 | A kind of education exhibition booth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108771327A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4401348A1 (en) * | 1994-01-18 | 1995-07-20 | Bke Bildtechnik Inh Ernst Stec | Multifunctional media system for conference and educational rooms |
| CN204348150U (en) * | 2015-01-16 | 2015-05-20 | 辛延英 | Ideological and political education information accessory exhibition device |
| CN204990811U (en) * | 2015-10-03 | 2016-01-20 | 刘明光 | Primary school is publicity board for ideological and moral education |
| CN205097767U (en) * | 2015-10-28 | 2016-03-23 | 中国人民解放军空军勤务学院 | But dual -purpose teaching board of turn -over |
| CN205943122U (en) * | 2016-06-07 | 2017-02-08 | 哈尔滨理工大学 | University student mental health education propaganda demonstrating board |
| CN206194161U (en) * | 2016-07-11 | 2017-05-24 | 江苏海事职业技术学院 | English teaching device |
| CN106952512A (en) * | 2017-03-30 | 2017-07-14 | 牡丹江医学院 | A propaganda device for ideological and political education |
-
2018
- 2018-06-14 CN CN201810613709.7A patent/CN108771327A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4401348A1 (en) * | 1994-01-18 | 1995-07-20 | Bke Bildtechnik Inh Ernst Stec | Multifunctional media system for conference and educational rooms |
| CN204348150U (en) * | 2015-01-16 | 2015-05-20 | 辛延英 | Ideological and political education information accessory exhibition device |
| CN204990811U (en) * | 2015-10-03 | 2016-01-20 | 刘明光 | Primary school is publicity board for ideological and moral education |
| CN205097767U (en) * | 2015-10-28 | 2016-03-23 | 中国人民解放军空军勤务学院 | But dual -purpose teaching board of turn -over |
| CN205943122U (en) * | 2016-06-07 | 2017-02-08 | 哈尔滨理工大学 | University student mental health education propaganda demonstrating board |
| CN206194161U (en) * | 2016-07-11 | 2017-05-24 | 江苏海事职业技术学院 | English teaching device |
| CN106952512A (en) * | 2017-03-30 | 2017-07-14 | 牡丹江医学院 | A propaganda device for ideological and political education |
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Application publication date: 20181109 |
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